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Microstructural regulation and interfacial electronic coupling in spinel CuCo2O4/MWCNT hybrids for enhanced charge-storage kinetics.

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Title: Microstructural regulation and interfacial electronic coupling in spinel CuCo2O4/MWCNT hybrids for enhanced charge-storage kinetics.
Authors: Ramakrishna Kumar, AB1 (AUTHOR), Suriya, B.1 (AUTHOR), Muniraj, S.1 (AUTHOR) smuniraj@rkmvc.ac.in
Source: Materials Science & Engineering: B. Oct2026, Vol. 332, pN.PAG-N.PAG. 1p.
Subjects: Copper compounds, Carbon nanotubes, Energy storage equipment, Cobalt compounds, Supercapacitors, Nanostructures, Spinel group
Abstract: Achieving simultaneous enhancement of energy density, rate capability, and cycling stability remains a key challenge for pseudocapacitive materials. In this work, a CTAB-assisted hydrothermal strategy was employed to regulate the microstructure of spinel CuCo 2 O 4 through controlled nanocube formation, followed by integration with multiwalled carbon nanotubes (MWCNTs). The surfactant-directed growth yields size-regulated nanocubes with reduced agglomeration, thereby shortening ion-transport pathways. Coupling with the conductive MWCNT network establishes improved interfacial contact and continuous electron-transport channels. Kinetic analysis indicates a transition from diffusion-dominated charge storage in pristine CuCo 2 O 4 to predominantly surface-controlled behavior in the CuCo 2 O 4 /MWCNT hybrid, accompanied by reduced charge-transfer resistance. The optimized hybrid electrode delivers a specific capacitance of 2205 F g−1 at 1 A g−1 with 97% retention over 10,000 cycles. An assembled asymmetric device operating within 1.6 V achieves an energy density of 40.37 Wh kg−1 at 800 W kg−1. These findings demonstrate that microstructural regulation combined with interfacial electronic coupling effectively modulates charge-storage kinetics in spinel oxide–carbon hybrid systems. [Display omitted] • CTAB assisted CuCo 2 O 4 nanocubes with PPy and MWCNTs hybrid electrodes. • MWCNT framework enhances surface area, porosity, and ion-accessible pathways. • CuCo 2 O 4 /MW electrode delivers 2205 F g−1 at 1 A g−1 with excellent rate capability. • Outstanding cycling stability of 97% retention after 10,000 cycles. • ASC device achieves 40.37 Wh kg−1 at 501.39 W kg−1 with high long-term durability. [ABSTRACT FROM AUTHOR]
Copyright of Materials Science & Engineering: B is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 195464340
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PubTypeId: academicJournal
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  Label: Title
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  Data: Microstructural regulation and interfacial electronic coupling in spinel CuCo2O4/MWCNT hybrids for enhanced charge-storage kinetics.
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  Data: <searchLink fieldCode="AR" term="%22Ramakrishna+Kumar%2C+AB%22">Ramakrishna Kumar, AB</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Suriya%2C+B%2E%22">Suriya, B.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Muniraj%2C+S%2E%22">Muniraj, S.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> smuniraj@rkmvc.ac.in</i>
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  Data: <searchLink fieldCode="JN" term="%22Materials+Science+%26+Engineering%3A+B%22">Materials Science & Engineering: B</searchLink>. Oct2026, Vol. 332, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Copper+compounds%22">Copper compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Carbon+nanotubes%22">Carbon nanotubes</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+storage+equipment%22">Energy storage equipment</searchLink><br /><searchLink fieldCode="DE" term="%22Cobalt+compounds%22">Cobalt compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Supercapacitors%22">Supercapacitors</searchLink><br /><searchLink fieldCode="DE" term="%22Nanostructures%22">Nanostructures</searchLink><br /><searchLink fieldCode="DE" term="%22Spinel+group%22">Spinel group</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Achieving simultaneous enhancement of energy density, rate capability, and cycling stability remains a key challenge for pseudocapacitive materials. In this work, a CTAB-assisted hydrothermal strategy was employed to regulate the microstructure of spinel CuCo 2 O 4 through controlled nanocube formation, followed by integration with multiwalled carbon nanotubes (MWCNTs). The surfactant-directed growth yields size-regulated nanocubes with reduced agglomeration, thereby shortening ion-transport pathways. Coupling with the conductive MWCNT network establishes improved interfacial contact and continuous electron-transport channels. Kinetic analysis indicates a transition from diffusion-dominated charge storage in pristine CuCo 2 O 4 to predominantly surface-controlled behavior in the CuCo 2 O 4 /MWCNT hybrid, accompanied by reduced charge-transfer resistance. The optimized hybrid electrode delivers a specific capacitance of 2205 F g−1 at 1 A g−1 with 97% retention over 10,000 cycles. An assembled asymmetric device operating within 1.6 V achieves an energy density of 40.37 Wh kg−1 at 800 W kg−1. These findings demonstrate that microstructural regulation combined with interfacial electronic coupling effectively modulates charge-storage kinetics in spinel oxide–carbon hybrid systems. [Display omitted] • CTAB assisted CuCo 2 O 4 nanocubes with PPy and MWCNTs hybrid electrodes. • MWCNT framework enhances surface area, porosity, and ion-accessible pathways. • CuCo 2 O 4 /MW electrode delivers 2205 F g−1 at 1 A g−1 with excellent rate capability. • Outstanding cycling stability of 97% retention after 10,000 cycles. • ASC device achieves 40.37 Wh kg−1 at 501.39 W kg−1 with high long-term durability. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Materials Science & Engineering: B is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.mseb.2026.119665
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      – Code: eng
        Text: English
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      – SubjectFull: Copper compounds
        Type: general
      – SubjectFull: Carbon nanotubes
        Type: general
      – SubjectFull: Energy storage equipment
        Type: general
      – SubjectFull: Cobalt compounds
        Type: general
      – SubjectFull: Supercapacitors
        Type: general
      – SubjectFull: Nanostructures
        Type: general
      – SubjectFull: Spinel group
        Type: general
    Titles:
      – TitleFull: Microstructural regulation and interfacial electronic coupling in spinel CuCo2O4/MWCNT hybrids for enhanced charge-storage kinetics.
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            NameFull: Ramakrishna Kumar, AB
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            NameFull: Suriya, B.
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            NameFull: Muniraj, S.
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            – D: 01
              M: 10
              Text: Oct2026
              Type: published
              Y: 2026
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              Value: 332
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            – TitleFull: Materials Science & Engineering: B
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